A Hopkinsonian slender rod coaxiality correction testing device

Abstract

This utility model discloses a Hopkinson bar coaxiality correction and testing device, relating to the field of Hopkinson bar coaxiality correction and testing technology. It includes a base, a movable frame a on one side of the base, a drive mechanism on one side of the movable frame a, and a hydraulic rod mounted on one side of the bottom of the movable frame a. This device can stably fix the Hopkinson bar and accurately detect and correct it. It can also clean debris. During fixing, rotating the bidirectional threaded rod b drives the clamping block to clamp the bar. A rubber pad prevents pinching damage. The slender bar squeezes the rubber block, causing the movable block to compress the spring a. The elastic force of the spring a causes the rubber block to deform and adhere tightly to the bar through the cavity. During testing, a motor drives the threaded rod body to move the movable frame a. After the movable rod touches the bent part of the bar, it compresses the spring, transmitting the force to a BMP585 pressure sensor. The signal triggers a KJT-LV105A alarm via a DVP-EH3PLC. The hydraulic rod then corrects the bar. Simultaneously, a cleaning ring moves with the movable frame a to clean debris from the outside of the bar. Moving the locking block compresses the spring b, allowing the ring to be removed for cleaning.

Description

Technical Field

[0001] This utility model relates to the technical field of Hopkinson's disease slender rod coaxiality correction testing equipment, specifically a Hopkinson's disease slender rod coaxiality correction testing equipment. Background Technology

[0002] In Hopkinson's apparatus experiments, the high-speed impact of rods—incident rods, exit rods, etc.—is crucial for measuring material properties under high strain. Therefore, the levelness and concentricity of these rods significantly affect the experimental results. Typically, the rods are around 3 meters long, with small diameters and long lengths. During transport, they often sway and bend under gravity, making pre-experiment correction of the rod system extremely important.

[0003] For example, the utility model disclosed in CN212321355U discloses a Hopkinson correction device for slender rod systems. This device employs a precision measurement and protection device with accurate graduations, combining protection and precise measurement functions. It reduces the coaxiality of slender rods to within 0.03mm, enabling precise correction. The device accurately determines the correction dimension and adapts to the rod system dimensions, ensuring accurate correction results and improving the work efficiency of calibration personnel by approximately 50%. Operation is simple; even inexperienced personnel can accurately complete the correction, significantly reducing the workload of personnel.

[0004] When using the correction and testing equipment described above, the Hopkinson bar is placed on the support, and then the correction rod is moved to the bent position of the Hopkinson bar. The worm gear screw is rotated to drive the correction rod downward, thereby correcting the bent part of the Hopkinson bar. However, since the support does not limit the Hopkinson bar, it is easy for the Hopkinson bar to move during correction. Utility Model Content

[0005] The purpose of this invention is to provide a Hopkinson bar coaxiality correction and testing device to solve the problem mentioned in the background art. In the existing Hopkinson bar coaxiality correction and testing device, the Hopkinson bar is placed on a support, and then the correction rod is moved to the bent position of the Hopkinson bar. The worm gear screw is rotated to drive the correction rod to move down, thereby correcting the bent part of the Hopkinson bar. However, since the support does not limit the movement of the Hopkinson bar, the Hopkinson bar is prone to move during the correction.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a base, a movable frame a is provided on one side of the base, a driving mechanism is provided on one side of the movable frame a, and a hydraulic rod is installed on one side of the bottom of the movable frame a; clamping mechanisms are provided at both ends of the base, each clamping mechanism including a movable frame b slidably connected to both ends of the base, a clamping block is slidably connected to the top of the movable frame b, a movable block is slidably connected inside the clamping block, a detection mechanism is provided at the bottom of the movable frame a, and a bidirectional threaded rod a is rotatably connected to the inside of the base via a bearing, the outer side of the bidirectional threaded rod a being threadedly connected to the movable frame b; a cleaning mechanism is provided on one side of the bottom of the movable frame a.

[0007] Furthermore, the drive mechanism includes a motor bolted to one side of the base, and the output end of the motor is fixedly connected to a threaded rod body, the outer side of which is threadedly connected to the movable frame a.

[0008] Furthermore, the detection mechanism includes a movable rod slidably connected to the bottom of the movable frame a, a ball bearing rolledly connected to the bottom of the movable rod, a return spring fixedly connected to the top of the movable rod, a pressure sensor fixedly connected to the top of the return spring, the top of the pressure sensor fixedly connected to the movable frame a, and an alarm electrically connected to the output end of the pressure sensor.

[0009] Furthermore, the interior of the movable frame b is rotatably connected to a bidirectional threaded rod b via a bearing, the outer side of the bidirectional threaded rod b is threadedly connected to the clamping block, the interior of the clamping block is fixedly connected to a spring a, and one side of the clamping block is fixedly connected to a rubber pad.

[0010] Furthermore, one end of the spring a is fixedly connected to the moving block, and a rubber block is fixedly connected to one side of the moving block, with a cavity inside the rubber block.

[0011] Furthermore, the cleaning mechanism includes a cleaning ring disposed at the bottom of the movable frame a away from the hydraulic rod, a cleaning sponge being fixedly connected to the inner side of the cleaning ring, and a slider being fixedly connected to the top of the cleaning ring.

[0012] Furthermore, the outer side of the slider is slidably connected to the movable frame a, and a locking block is slidably connected to one side of the movable frame a. The top of the locking block abuts against a spring b, and the top of the spring b abuts against the movable frame a. The locking block is located on one side of the slider.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the device can stably fix the Hopkinson slender rod and accurately detect and correct it, and can also clean up debris. When fixing, rotating the bidirectional threaded rod b drives the clamping block to clamp it. The rubber pad prevents pinching damage. The slender rod squeezes the rubber block, causing the moving block to compress the spring a. The elastic force of the spring a causes the rubber block to deform and stick to the rod through the cavity. When detecting, the motor drives the threaded rod body to move the moving frame a. The moving rod will squeeze the reset spring, and the force is transmitted to the BMP585 pressure sensor. The signal is triggered by the DVP-EH3PLC to the KJT-LV105A alarm. Then, the hydraulic rod is used for correction. At the same time, the cleaning ring cleans the debris outside the rod with the moving frame a. Moving the card block to compress the spring b can remove the ring for cleaning.

[0014] 1. This equipment can achieve stable fixation, precise coaxiality detection, and effective correction of Hopkinson's slender rods. During fixation, the bidirectional threaded rod b is rotated to drive the clamping block through threaded transmission, which moves two sets of clamping blocks to clamp the slender rod. The rubber pad can prevent damage to the rod body. The slender rod will squeeze the rubber block, causing the rubber block to push one side of the moving block to compress the spring a. The elastic force released after the spring a is compressed will push the rubber block to fit tightly with the slender rod, and the internal cavity of the rubber block can deform it, further enhancing the fixation effect on slender rods of different specifications. During detection, the motor is started to drive the threaded rod body to rotate, causing the moving frame a to move. The moving frame a drives the bottom moving rod to contact the slender rod. If a bend is encountered, the moving rod will move and squeeze the return spring. The spring transmits the force to the pressure sensor of model BMP585. The sensor sends a signal to the DVP-EH3 PLC controller, and the controller then controls the KJT-LV105A alarm to sound. After the coaxiality detection is completed, the hydraulic rod is moved to the bend to achieve correction.

[0015] 2. This equipment effectively cleans debris from the Hopkinson's slender rod, preventing it from affecting the accuracy of the test. It also facilitates the disassembly and maintenance of the cleaning components. During the test, because debris on the surface of the slender rod may interfere with the coaxiality test results, the equipment has a set of cleaning rings on one side of the moving frame a. The Hopkinson's slender rod needs to pass through the cleaning rings. When the moving frame a moves along the threaded rod body under the drive of the motor to move the rod for testing, the cleaning rings will move synchronously with the moving frame a. The cleaning sponge inside can thoroughly clean the outside of the slender rod, greatly reducing the interference of debris on the accuracy of the test data. When the cleaning ring needs to be cleaned after a period of use, simply manually move the locking block upwards. During the upward movement of the locking block, it will squeeze the top spring b. After the locking block completely disengages from the limit of the top slider of the cleaning ring, the cleaning ring can be easily removed from the moving frame a. The operation is convenient and facilitates subsequent cleaning and maintenance of the cleaning ring. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the mobile frame a of this utility model; Figure 4 This is a three-dimensional structural diagram of the mobile frame b of this utility model; Figure 5 This is a three-dimensional cross-sectional view of the mobile frame a of this utility model; Figure 6 This utility model Figure 4 A magnified structural diagram at point A; Figure 7 This utility model Figure 5 A magnified structural diagram at point B.

[0017] In the diagram: 1. Base; 2. Movable frame a; 3. Movable frame b; 4. Clamping block; 5. Movable block; 6. Movable rod; 7. Return spring; 8. Pressure sensor; 9. Hydraulic rod; 10. PLC controller; 11. Alarm; 12. Bidirectional threaded rod a; 13. Bidirectional threaded rod b; 14. Rubber pad; 15. Spring a; 16. Rubber block; 17. Cleaning ring; 18. Slider; 19. Locking block; 20. Spring b; 21. Motor; 22. Threaded rod body. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: Please refer to Figures 1-2 The present invention provides the following technical solution: a base 1, a movable frame a2 is provided on one side of the base 1, a driving mechanism is provided on one side of the movable frame a2, and a hydraulic rod 9 is installed on one side of the bottom of the movable frame a2; clamping mechanisms are provided at both ends of the base 1, the clamping mechanisms include movable frames b3 slidably connected to both ends of the base 1, a clamping block 4 is slidably connected to the top of the movable frame b3, a movable block 5 is slidably connected inside the clamping block 4, a detection mechanism is provided at the bottom of the movable frame a2, and a bidirectional threaded rod a12 is rotatably connected to the inside of the base 1 through a bearing, and the outer side of the bidirectional threaded rod a12 is threadedly connected to the movable frame b3; the Hopkinson bar coaxiality correction detection device, when detecting the Hopkinson bar, fixes the Hopkinson bar on the movable frame b3.

[0020] Please see Figures 1-2The drive mechanism includes a motor 21 mounted on one side of the base 1 by bolts. The output end of the motor 21 is fixedly connected to a threaded rod body 22. The outer side of the threaded rod body 22 is threadedly connected to the moving frame a2. Then, the motor 21 is started to drive the threaded rod body 22 to rotate, so that the threaded rod body 22 and the moving frame a2 perform threaded transmission, thereby driving the moving frame a2 to move.

[0021] Please see Figures 2-3 and Figure 5 The detection mechanism includes a movable rod 6 slidably connected to the bottom of a movable frame a2. A ball bearing is rolled along the bottom of the movable rod 6. A return spring 7 is fixedly connected to the top of the movable rod 6. A pressure sensor 8 is fixedly connected to the top of the return spring 7. The top of the pressure sensor 8 is fixedly connected to the movable frame a2. The output of the pressure sensor 8 is electrically connected to a PLC controller 10, and the output of the PLC controller 10 is electrically connected to an alarm 11. The movable frame a2 will cause the movable rod 6 at the bottom to contact the Hopkinson bar. When a bend in the Hopkinson bar is detected, the movable rod 6 will... The movement causes the return spring 7 to be compressed, which in turn transmits the force to the pressure sensor 8 (model BMP585). The pressure sensor 8 sends a signal to the PLC controller 10 (model DVP-EH3), which then controls the alarm 11 (model KJT-LV105A) to sound an alarm. This completes the detection of the coaxiality of the Hopkinson bar. Then, the hydraulic rod 9 can be moved to the bend of the Hopkinson bar to correct it.

[0022] Please see Figure 2 , Figure 4 and Figure 6Inside the movable frame b3, a bidirectional threaded rod b13 is rotatably connected via bearings. The outer side of the bidirectional threaded rod b13 is threadedly connected to the clamping block 4. A spring a15 is fixedly connected inside the clamping block 4, and a rubber pad 14 is fixedly connected to one side of the clamping block 4. One end of the spring a15 is fixedly connected to the movable block 5, and a rubber block 16 is fixedly connected to one side of the movable block 5, with a cavity inside the rubber block 16. To ensure that the Hopkinson's slender rod can be stably fixed on the base 1, the bidirectional threaded rod b13 is rotated to drive the clamping block 4, thereby moving the two sets of clamping blocks 4. The two sets of clamping blocks 4 will then move the Hopkinson's slender rod. The clamping mechanism, with rubber pad 14, prevents the Hopkinson bar from being pinched. The Hopkinson bar compresses the rubber block 16, which in turn compresses the moving block 5 and spring a15 on one side. The spring a15, when compressed, releases its elastic force, pushing the rubber block 16 to press against the Hopkinson bar. The rubber block 16 also deforms through its internal cavity, thus conforming to the outer side of the Hopkinson bar and enhancing its fixation. By rotating the bidirectional threaded rod a12 and the moving frame b3 for threaded transmission, the two sets of moving frames b3 can be moved in opposite directions to accommodate Hopkinson bars of different lengths.

[0023] Example 2: Please refer to Figure 3 , Figure 5 and Figure 7 Based on Embodiment 1, a cleaning mechanism for cleaning Hopkinson's slender rods is also disclosed, the specific structure of which is as follows: a cleaning mechanism is provided on one side of the bottom of the movable frame a2, the cleaning mechanism includes a cleaning ring 17 provided on the side of the bottom of the movable frame a2 away from the hydraulic rod 9, a cleaning sponge is fixedly connected to the inner side of the cleaning ring 17, and a slider 18 is fixedly connected to the top of the cleaning ring 17; the outer side of the slider 18 is slidably connected to the movable frame a2, a locking block 19 is slidably connected to one side of the movable frame a2, the top of the locking block 19 abuts against a spring b20, the top of the spring b20 abuts against the movable frame a2, and the locking block 19 is located on one side of the slider 18.

[0024] Please see Figure 3 , Figure 5 and Figure 7 In order to prevent debris on the Hopkinson bar from affecting the accuracy of the test, the Hopkinson bar coaxiality correction testing device uses a set of cleaning rings 17 on one side of the moving frame a2. The Hopkinson bar passes through the cleaning rings 17, so that the cleaning rings 17 clean the outside of the Hopkinson bar while moving with the moving frame a2, thereby reducing the interference of debris on the test. When it is necessary to remove and clean the cleaning rings 17, the locking block 19 is moved upward by pushing it. The locking block 19 will squeeze the spring b20 at the top. When the locking block 19 is released from the limit of the slider 18, the cleaning rings 17 can be removed.

[0025] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A Hopkinson slender rod coaxiality correction and testing device, comprising a base (1), a movable frame a (2) is provided on one side of the base (1), a driving mechanism is provided on one side of the movable frame a (2), and a hydraulic rod (9) is installed on one side of the bottom of the movable frame a (2). Its features are: Both ends of the base (1) are provided with clamping mechanisms. The clamping mechanism includes a movable frame b (3) that is slidably connected to both ends of the base (1). A clamping block (4) is slidably connected to the top of the movable frame b (3). A movable block (5) is slidably connected inside the clamping block (4). A detection mechanism is provided at the bottom of the movable frame a (2). A bidirectional threaded rod a (12) is rotatably connected inside the base (1) through a bearing. The outer side of the bidirectional threaded rod a (12) is threadedly connected to the movable frame b (3). A cleaning mechanism is provided on one side of the bottom of the mobile frame a (2).

2. The Hopkinson slender rod coaxiality correction and testing device according to claim 1, characterized in that: The drive mechanism includes a motor (21) mounted on one side of the base (1) by bolts. The output end of the motor (21) is fixedly connected to a threaded rod body (22). The outer side of the threaded rod body (22) is threadedly connected to the movable frame a (2).

3. The Hopkinson slender rod coaxiality correction and testing device according to claim 1, characterized in that: The detection mechanism includes a movable rod (6) slidably connected to the bottom of a movable frame a (2), a ball bearing is rolledly connected to the bottom of the movable rod (6), a return spring (7) is fixedly connected to the top of the movable rod (6), a pressure sensor (8) is fixedly connected to the top of the return spring (7), the top of the pressure sensor (8) is fixedly connected to the movable frame a (2), the output end of the pressure sensor (8) is electrically connected to a PLC controller (10), and the output end of the PLC controller (10) is electrically connected to an alarm (11).

4. The Hopkinson slender rod coaxiality correction and testing device according to claim 1, characterized in that: The inside of the movable frame b (3) is rotatably connected to a bidirectional threaded rod b (13) via a bearing. The outside of the bidirectional threaded rod b (13) is threadedly connected to the clamping block (4). The inside of the clamping block (4) is fixedly connected to a spring a (15). A rubber pad (14) is fixedly connected to one side of the clamping block (4).

5. The Hopkinson slender rod coaxiality correction and testing device according to claim 4, characterized in that: One end of the spring a (15) is fixedly connected to the moving block (5), and a rubber block (16) is fixedly connected to one side of the moving block (5), and the inside of the rubber block (16) is provided with a cavity.

6. The Hopkinson slender rod coaxiality correction and testing device according to claim 2, characterized in that: The cleaning mechanism includes a cleaning ring (17) disposed on the side of the bottom of the movable frame a (2) away from the hydraulic rod (9), a cleaning sponge is fixedly connected to the inner side of the cleaning ring (17), and a slider (18) is fixedly connected to the top of the cleaning ring (17).

7. The Hopkinson slender rod coaxiality correction and testing device according to claim 6, characterized in that: The outer side of the slider (18) is slidably connected to the moving frame a (2). A locking block (19) is slidably connected to one side of the moving frame a (2). A spring b (20) abuts against the top of the locking block (19). The top of the spring b (20) abuts against the moving frame a (2). The locking block (19) is located on one side of the slider (18).

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